/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.engine.compaction.utils;

import org.apache.iotdb.db.conf.IoTDBConfig;
import org.apache.iotdb.db.conf.IoTDBDescriptor;
import org.apache.iotdb.db.engine.compaction.constant.*;

public class CompactionConfigRestorer {
    private boolean enableSeqSpaceCompaction = true;
    private boolean enableUnseqSpaceCompaction = false;
    private boolean enableCrossSpaceCompaction = true;
    private CrossCompactionSelector crossStrategy = CrossCompactionSelector.REWRITE;
    private InnerSequenceCompactionSelector innerStrategy =
            InnerSequenceCompactionSelector.SIZE_TIERED;
    private CompactionPriority priority = CompactionPriority.BALANCE;
    private long targetFileSize = 1073741824L;
    private long targetChunkSize = 1048576L;
    private long targetChunkPointNum = 100000L;
    private long chunkSizeLowerBoundInCompaction = 128L;
    private long chunkPointNumLowerBoundInCompaction = 100L;
    private int maxInnerCompactionCandidateFileNum = 30;
    private int maxCrossCompactionCandidateFileNum = 1000;
    private int concurrentCompactionThread = 10;
    private long compactionScheduleIntervalInMs = 60000L;
    private long compactionSubmissionIntervalInMs = 60000L;
    private int compactionWriteThroughputMbPerSec = 8;

    private CrossCompactionPerformer oldCrossPerformer =
            IoTDBDescriptor.getInstance().getConfig().getCrossCompactionPerformer();
    private InnerSeqCompactionPerformer oldInnerSeqPerformer =
            IoTDBDescriptor.getInstance().getConfig().getInnerSeqCompactionPerformer();
    private InnerUnseqCompactionPerformer oldInnerUnseqPerformer =
            IoTDBDescriptor.getInstance().getConfig().getInnerUnseqCompactionPerformer();

    public CompactionConfigRestorer() {
    }

    public void restoreCompactionConfig() {
        IoTDBConfig config = IoTDBDescriptor.getInstance().getConfig();
        config.setEnableSeqSpaceCompaction(enableSeqSpaceCompaction);
        config.setEnableUnseqSpaceCompaction(enableUnseqSpaceCompaction);
        config.setEnableCrossSpaceCompaction(enableCrossSpaceCompaction);
        config.setCrossCompactionSelector(crossStrategy);
        config.setInnerSequenceCompactionSelector(innerStrategy);
        config.setCompactionPriority(priority);
        config.setTargetCompactionFileSize(targetFileSize);
        config.setTargetChunkSize(targetChunkSize);
        config.setTargetChunkPointNum(targetChunkPointNum);
        config.setChunkSizeLowerBoundInCompaction(chunkSizeLowerBoundInCompaction);
        config.setChunkPointNumLowerBoundInCompaction(chunkPointNumLowerBoundInCompaction);
        config.setMaxInnerCompactionCandidateFileNum(maxInnerCompactionCandidateFileNum);
        config.setMaxCrossCompactionCandidateFileNum(maxCrossCompactionCandidateFileNum);
        config.setCompactionThreadCount(concurrentCompactionThread);
        config.setCompactionScheduleIntervalInMs(compactionScheduleIntervalInMs);
        config.setCompactionSubmissionIntervalInMs(compactionSubmissionIntervalInMs);
        config.setCompactionIORatePerSec(compactionWriteThroughputMbPerSec);
        config.setCrossCompactionPerformer(oldCrossPerformer);
        config.setInnerSeqCompactionPerformer(oldInnerSeqPerformer);
        config.setInnerUnseqCompactionPerformer(oldInnerUnseqPerformer);
    }
}
